1.

Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is `1s^(2),2s^(2)2p^(3)`, the simplest formula for this compound isA. `Mg_(2)X`B. `MgX_(2)`C. `Mg_(2)X_(3)`D. `Mg_(3)X_(2)`

Answer» Correct Answer - D
Given, electronic configuration of
`X=1s^(2)2s^(2)2p^(3)`
`therefore` The valency of X will be 3.
The valency of Mg is +2
`therefore` Magnesium reacts with element X to form an ionic compound with formula `Mg_(3)X_(2)`.


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